from QQLoginTool.QQtool import OAuthQQ
from django.conf import settings
from django.shortcuts import render

# Create your views here.
from rest_framework.generics import GenericAPIView
from rest_framework.response import Response
from rest_framework.views import APIView

from oauth.models import OAuthQQUser

from oauth.utils import generate_sign_openid

from oauth import serializers

from users.models import User


class OAuthQQLoginView(APIView):
    def get(self, request):
        # 1,获取参数
        state = request.query_params.get("state", "/")

        # 2,创建qq对象
        oauth_qq = OAuthQQ(client_id=settings.QQ_CLIENT_ID,
                           client_secret=settings.QQ_CLIENT_SECRET,
                           redirect_uri=settings.QQ_REDIRECT_URI,
                           state=state)

        # 3,返回qq登陆页面
        login_url = oauth_qq.get_qq_url()
        return Response({"auth_url": login_url})

class OAuthQQUserView(GenericAPIView):
    serializer_class = serializers.OAuthQQUserSerializer
    def get(self, request):
        # 1,获取参数code,校验
        code = request.query_params.get("code")
        if not code:
            return Response("code丢失了")

        # 2,根据code获取access_token
        oauth_qq = OAuthQQ(client_id=settings.QQ_CLIENT_ID,
                           client_secret=settings.QQ_CLIENT_SECRET,
                           redirect_uri=settings.QQ_REDIRECT_URI,
                           state="/")
        access_token = oauth_qq.get_access_token(code)

        # 3,根据access_token获取openid
        openid = oauth_qq.get_open_id(access_token)

        # 4,通过openid查询qq对象用户
        try:
            oauth_qq_user = OAuthQQUser.objects.get(openid=openid)
        except OAuthQQUser.DoesNotExist:
            # 4,1初次授权
            sign_openid = generate_sign_openid(openid)
            return Response({"access_token": sign_openid})
        else:
            # 5,非初次授权
            user = oauth_qq_user.user

            from rest_framework_jwt.settings import api_settings
            jwt_payload_handler = api_settings.JWT_PAYLOAD_HANDLER
            jwt_encode_handler = api_settings.JWT_ENCODE_HANDLER
            payload = jwt_payload_handler(user)
            token = jwt_encode_handler(payload)

            return Response({
                "token": token,
                "username": user.username,
                "user_id": user.id
            })
        # print("openid = %s" % openid)
        # return Response("openid = %s" % openid)

    def post(self, request):
        # 1,获取参数
        dict_data = request.data

        # 2,创建序列化器
        serializer = self.get_serializer(data=dict_data)

        # 3,校验,入库
        serializer.is_valid(raise_exception=True)
        user = serializer.save()

        # 3,1根据用户数据,生成token
        from rest_framework_jwt.settings import api_settings
        jwt_payload_handler = api_settings.JWT_PAYLOAD_HANDLER
        jwt_encode_handler = api_settings.JWT_ENCODE_HANDLER
        payload = jwt_payload_handler(user)
        token = jwt_encode_handler(payload)

        # 4,返回响应
        return Response(
            {
                "token":token,
                "user_id":user.id,
                "username":user.username
            }
        )

